Accessibility service ongesture and window _state_changed not working

Question

I want to get notified when a app open and I want to perform a task on swipe event The onKeyEvent() method is working perfectly but others not working

I have written this but swipe gesture and toast is not working when I open a app

public class ass extends AccessibilityService {

    @Override
    protected void onServiceConnected() {
        super.onServiceConnected();
}
    @Override
    public void onAccessibilityEvent(AccessibilityEvent event) {
        if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
            if (event.getPackageName() != null && event.getClassName() != null) {
                ComponentName componentName = new ComponentName(
                    event.getPackageName().toString(),
                    event.getClassName().toString()
                );

                ActivityInfo activityInfo = tryGetActivity(componentName);
                Toast.makeText(getApplication(), "Currenly "+componentName.flattenToShortString(), Toast.LENGTH_SHORT).show();
                boolean isActivity = activityInfo != null;
                if (isActivity){
                    
                }
                
            }
        }
    }

    private ActivityInfo tryGetActivity(ComponentName componentName) {
        try {
            return getPackageManager().getActivityInfo(componentName, 0);
        } catch (PackageManager.NameNotFoundException e) {
            return null;
        }
    }

    @Override
    protected boolean onGesture(int gestureId) {
        if(gestureId==GESTURE_SWIPE_LEFT_AND_DOWN){
            a.vv(); return true;
        }else{return false;}
        
    }}`

Here is the XML

<accessibility-servicexmlns:android="http://schemas.android.com/apk/res/android"
    android:packageNames=""
    android:accessibilityEventTypes="typeAllMask|typeWindowStateChanged"
    android:accessibilityFlags="flagRequestFilterKeyEvents|flagIncludeNotImportantViews|flagReportViewIds"
    android:description="@string/des"
    android:canRetrieveWindowContent="true"
    android:canRequestTouchExplorationMode="true"
    android:accessibilityFeedbackType="feedbackSpoken"
    android:notificationTimeout="100"
    android:canPerformGestures="true"
    android:canRequestFilterKeyEvents="true"
    android:settingsActivity="fool.r.ass"
/>